Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider

We consider a minimal extension of the Standard Model where a real, gauge singlet scalar field is added to the standard spectrum. Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between...

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Detalles Bibliográficos
Autores principales: Bhattacharyya, Gautam, Branco, Gustavo C., Nandi, S.
Lenguaje:eng
Publicado: 2007
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.77.117701
http://cds.cern.ch/record/1076164
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author Bhattacharyya, Gautam
Branco, Gustavo C.
Nandi, S.
author_facet Bhattacharyya, Gautam
Branco, Gustavo C.
Nandi, S.
author_sort Bhattacharyya, Gautam
collection CERN
description We consider a minimal extension of the Standard Model where a real, gauge singlet scalar field is added to the standard spectrum. Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between the SM Higgs and the new state is near maximal, (ii) the ratio of the two Higgs mass eigenstates is fixed ($\sim \sqrt{3}$), (iii) the decay modes of each of the two eigenstates are Standard Model like. We also study how electroweak precision tests constrain this scenario. We predict the lighter Higgs to lie in the range of 114 and 145 GeV, and hence the heavier one between 198 and 250 GeV. The predictions of the model can be tested at the upcoming LHC.
id cern-1076164
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
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spelling cern-10761642023-03-14T20:25:14Zdoi:10.1103/PhysRevD.77.117701http://cds.cern.ch/record/1076164engBhattacharyya, GautamBranco, Gustavo C.Nandi, S.Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron ColliderParticle Physics - PhenomenologyWe consider a minimal extension of the Standard Model where a real, gauge singlet scalar field is added to the standard spectrum. Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between the SM Higgs and the new state is near maximal, (ii) the ratio of the two Higgs mass eigenstates is fixed ($\sim \sqrt{3}$), (iii) the decay modes of each of the two eigenstates are Standard Model like. We also study how electroweak precision tests constrain this scenario. We predict the lighter Higgs to lie in the range of 114 and 145 GeV, and hence the heavier one between 198 and 250 GeV. The predictions of the model can be tested at the upcoming LHC.We consider a minimal extension of the standard model where a real, gauge singlet scalar field is added to the standard spectrum. Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between the standard model Higgs and the new state is near maximal, (ii) the ratio of the two Higgs mass eigenstates is fixed ($\sim \sqrt{3}$), (iii) the decay modes of each of the two eigenstates are standard model like. We also study how electroweak precision tests constrain this scenario. We predict the lighter Higgs to lie in the range of 114 and 145 GeV, and hence the heavier one between 198 and 250 GeV. The predictions of the model can be tested at the upcoming LHC.arXiv:0712.2693CERN-PH-TH-2007-264OSU-HEP-07-07SINP-TNP-07-33CERN-PH-TH-2007-264OSU-HEP-07-07SINP-TNP-07-33oai:cds.cern.ch:10761642007-12-18
spellingShingle Particle Physics - Phenomenology
Bhattacharyya, Gautam
Branco, Gustavo C.
Nandi, S.
Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider
title Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider
title_full Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider
title_fullStr Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider
title_full_unstemmed Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider
title_short Universal doublet-singlet Higgs couplings and phenomenology at the CERN Large Hadron Collider
title_sort universal doublet-singlet higgs couplings and phenomenology at the cern large hadron collider
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.77.117701
http://cds.cern.ch/record/1076164
work_keys_str_mv AT bhattacharyyagautam universaldoubletsinglethiggscouplingsandphenomenologyatthecernlargehadroncollider
AT brancogustavoc universaldoubletsinglethiggscouplingsandphenomenologyatthecernlargehadroncollider
AT nandis universaldoubletsinglethiggscouplingsandphenomenologyatthecernlargehadroncollider

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